Outboard motor mounting



Oct. 30, 1962 J. VAGHI OUTBOARD MOTOR MOUNTING 2 Sheets-Sheet 1 Filed March 8, 1961 INVENTOR BY ,Ahw 9 ATT RNEYS.

Oct. 30, 1962 J. VAGHI 3,060,887

OUTBOARD MOTOR MOUNTING Filed March 8, 1961 2 Sheets-Sheet 2 l// a. g g a? i! 201@I J/ a! 30 ll/35" 36 3 W "[1 5/ R I A 9 .67

' INVENTOR rates fifihfid? Patented ct. 30, 1962 hhee This invention relates to an outboard motor mounting for boats, and has for an object to provide a mounting for the motor which will greatly reduce the tendency of the push of the propeller to lift the forward end of the boat out of the water, but will tend to keep the boat level to greatly reduce or eliminate buckling of waves and water on the under side of the boat.

Another object is to provide a mounting for the motor in which the main push of this motor is applied forward, preferably in substantially the center on bottom of the boat, so the forward end is not lifted from the water, and the power required for operating the boat under given conditions is reduced, as it glides over the water instead of bucking the waves on its under surface as would be the case where this forward end is raised. This also gives more comfortable riding and easier and more reliable control.

With the foregoing and other objects in view, 1 have devised the construction illustrated in the accompanying drawings forming a part of this specification. It is, however, to be understood the invention is not limited to the specific details of construction and arrangement shown, but may embody various changes and modifications within the scope of the invention.

In these drawings:

FIG. 1 is a partial side elevation and a partial longitudinal section of a boat showing my invention applied thereto;

FIG. 2 is a front elevation of a portion of the stern transorn of the boat and the motor supporting block mounted therein;

FIG. 3 is a transverse section substantially on line 3-3 of FIG. 2 showing the end of the motor supporting block in elevation and with the protective plate at the end of the recess in the transom removed;

FIG. 4 is a top plan view of the motor supporting block and a portion of the transom;

FIG. 5 is a transverse section substantially on line 55 of FIG. 2;

FIG. 6 is a detail section substantially on line 66 of FIG. 4, and

FIG. 7 is a side elevation of the means of connecting the forward end of the push rod to the boat.

This device is shown as applied to a boat 10 and, as previously indicated, comprises means whereby the push of the propeller of the outboard motor is applied at the inner side of the boat adjacent the bottom at a point forwardly of the stern, and preferably at about the midpoint of the length of the boat, to reduce or eliminate the tendency of the forward end of the boat to be lifted out of the water by the action of the outboard motor, and thus keep the boat substantially level and avoid having it bucking the waves and water on the under side of the boat.

The boat as shown has a stern comprising an upright transverse transom 11, preferably upwardly and rearwardly inclined, as shown, and provided in its top edge with a transverse recess 12 in which is pivotally mounted a supporting block 13 for the outboard motor 14 having the usual depending shaft housing 15, with the propeller 16 driven thereby at the lower end of this housing.

The block 13 in the form shown comprises a wooden block of suitable thickness and width mounted in the recess 12 to extend longitudinally thereof. Mounted in the block at its upper edge is a pivot rod 17 extending longitudinally of the block, and in the arrangement shown is seated in a longitudinal channel 18 in the upper edge of the block. At its opposite ends it extends beyond the ends of the block, as indicated at 19, which ends are seated in suitable bearing members 20 recessed in the upper edge of the transom 11. These bearing blocks may have a top flange 21 resting on the top edge of the transom and secured thereto by suitable means, such, for example, as the screws 22. The pivot rod 17 may be retained in the channel 18 by a longitudinal cover plate or metal strip 23 over a wooden strip 23a covering this channel and secured by any suitable means such, for example, as the screws 24.

This rod also passes through an opening in a connecting member 25, which in the form shown, comprises a relatively heavy plate recessed on its under side, as indicated at 26, to seat over and in a transverse recess in the top edge of the block 13, but which recess 26 is of less width than the thickness of the block so that its opposite edges 27 and 28 are seated in channels in the opposite front and rear surfaces of the block 13. This plate includes a rear portion 29 extending outwardly rearwardly of the rear surface of the block 13, through which passes a cylindrical pin 39 with its opposite ends 31 projecting beyond the sides of the plate 25, and secured to the rear wall of the block 13 by suitable screws 32, the projecting end portions being preferably flattened on their outer surface 33 to receive the heads of the screws.

.At the forward side of the block 13 this plate 25 includes a forwardly and downwardly extending portion 34, to which is pivoted at 35 a forwardly extending push rod 36, which is conveniently connected to the plate 34 by a head block 37 forked at one end to straddle the plate 34, and through which passes the pivot pin or bolt 38. The rod 36 may be a tubular member and its end is threaded into the block 37, as indicated at 39. This pivot 35 is located below the pivot rod 17 for the supporting block, as indicated, for a purpose presently to be described.

Means is provided for securing the end of this push rod 36, to or adjacent the bottom of the boat, at a point spaced forwardly of the transom 11, preferably at about the midlength of the boat, as indicated in FIG. 1. This means in the form shown, comprises a substantially L-shaped bracket 40 having its base member 41 secured to the bottom 42 of the boat by any suitable means, such for example as the screws 4-3, and includes an upright leg portion 44 provided with an opening 45 through which the end of the push rod 36 extends, and in which it has a sliding movement. A push of the rod 36 on this bracket is transmitted to the bracket through a resilient means, preferably a suitable form of spring means. For this purpose, in the form shown, there is provided a split clamping block 46 which may be clamped at any desired position on the rod by suitable clamping screws or bolts 47, thus providing an abutment on the rod, and between this abutment and the member 44- of the bracket is a coil spring 48, preferably embracing the rod. This is a relatively heavy spring having sufficient compression resistance to take the pressure of the push rod which is transmitted to the bracket through the resilient action of the spring.

Means is provided to limit rearward movement of the motor supporting block 13, and therefore the motor, on reversal of the motor, and thus transmit this reversing action to the boat. This comprises a pair of generally substantially Z-shaped members 49 secured by one leg 56 to the front of the block 13 by suitable bolts or screws 51, with the forward leg 52 arranged at the forward side of a transverse plate or bar 53 secured to the front of the transom 11 at the lower edge of the recess 12, and the leg 52 overlaps the upper edge portion of this plate. It is spaced from the block 13 preferably a distance so that, when the block 13 is substantially in the vertical position, this leg 52 will engage the front of the plate 53 to limit movement of the block 13 and thus transmit reverse action of the motor to the boat. Upright protective and limit plates 54 may be secured to the front of the transom 11 by screws 54a at the opposite ends of the recess 12, and overhanging the ends of this recess and the ends of block 13 somewhat, as shown in FIGS. 2 and 4.

As shown in FIG. 1, the block 13 forms a pivotal support for the motor 14, the motor being mounted on this block by supporting brackets 55 being seated over the top edge of this block and secured by suitable clamping screws 56.

It will be seen that with this arrangement the forward push of the propeller 16 driven by the motor 14 will be transmitted to the supporting block 13, and will tend to swing the lower edge portion of this block forwardly, as indicated by the dotted lines in FIGS. 3 and 5. This motion will also shift the push rod 36 forwardly, compressing the spring 48 and transmitting this push of the rod against the bracket 44, from which it is transmitted to the bottom of the boat at a suitable distance spaced forwardly from the transverse stern transom 11 of the boat. As this is a considerable distance forwardly of the stern of the boat, it tends to depress the forward or bow end and to hold the boat level to keep the bow of the boat from rising from the water. In other words, it keeps the boat on an even keel, so the motor is not required to drive the boat forwardly against the bucking action of the waves and water on the under side of the boat. In other words, there is no bucking of the waves such as is required when the forward end of the boat is raised out of the water. It will be seen that if the motor were mounted in a stationary position on the top edge of the transom 11, the forward push of the propeller 16 would have a leverage action about the top edge of this transom, and would tend to lift the bow or forward portion of the boat upwardly off the surface of the water about the lower edge of the stern of the boat as a pivot. This action is obviated in the present construction, and because of the novel mounting of the motor on the pivoted block 13 there is a substantial leverage advantage applied to the push rod 36, transmitting a materially increased pressure on the bottom of the boat at the bracket 40. That is, as shown, the spacing of the propeller from the pivot rod 17 is considerably greater than the distance of the pivot 35 providing the connection of the rod 36 to the block. Therefore, if P1 is the push of the propeller at the point a and the push on the rod 36 at the point 35 is P2, then P1 is to P2 as the distance 35.17 is to the distance 41-17. It will therefore be seen that the pressure of the rod 36 on the bracket 40, and therefore on the bottom of the boat, is greatly augmented over the forward push of the propeller on the supporting block and the boat. As this structure and arrangement keeps the boat level or on an even keel, there is no lifting of the forward portion from the surface of the water, requiringbucking of the waves and the water on the underside of the boat. This reduces the power necessary to drive the boat under any given conditions over that required where the motor is mounted on a stationary transom, as the boat glides over the water instead of bucking the waves against the bottom surface of the boat. It also gives more comfortable riding in the boat, and more reliable control of the boat. The principal object is to get a material push from the motor driven propeller forwardly and substantially in the center on the bottom of the boat rather than having all the power applied to the top of a fixed transom at the stern of the boat, as in the present commonly employed means of mounting an outboard motor on a boat.

Having thus set forth the nature of my invention, I claim:

1. In combination a boat including an upright transom at its stern end, a supporting block pivotally secured to the upper part of the transom so as to be capable of pivoting about a horizontal transverse axis during normal operation of the boat while in the water, a rod connecting the lower part of said block at a point below the axis to the bottom of the boat at a point spaced forwardly of the stern, and an outboard motor mounted on the block with its propeller depending from the block to the rear of the transom.

2. In combination a boat including an upright transom at its stern end, a supporting block pivotally secured to the upper part of the transom so. as to be capable of pivoting about a horizontal transverse axis during normal operation of the boat while in the water, a bracket secured inside the boat at a point spaced forwardly of said transom, a rod pivotally connected to said block below its pivotal axis and having sliding connection at its forward end with said bracket including resilient means for transmitting forward pressure from the rod to said bracket, and an outboard motor mounted on the block and depending therefrom to the rear of the transom with its propeller spaced below the block.

3. The combination of claim 2 in which the resilient transmitting means comprises means providing an abutment on the rod spaced rearwardly from the bracket and a coiled spring between the abutment and the bracket.

4. An outboard motor mounting comprising a boat having an upright transverse transom at its stern provided with a recess in its upper edge, a block providing a support for an outboard motor pivotally mounted in said recess by a pivot rod extending longitudinally of the recess and supported at its opposite ends in the transom at opposite ends of the recess whereby said block is capable of pivoting during normal operation of the boat while in the water, a connecting member mounted on the block, and a push rod pivotally connected to the connectingmember at a point spaced below the pivot rod for the block, said push rod extending forwardly from the block and connected to the bottom of the boat at its forward end at a point spaced forwardly from the transom.

5. The outboard motor mounting of claim 4 in which the connection from the push rod to the bottom of the boat comprises a bracket secured to the boat, and a resilient means for transmitting forward pressure from this rod to the bracket.

6. The outboard motor mounting of claim 4 in which the connection from the push rod to the boat comprises a bracket secured to the boat at approximately the midlength thereof forwardly of the transom, the forward end of this rod has a sliding connection with this bracket, there is means providing an abutment on the rod, a coiled spring on the rod between the abutment and the bracket, and there is means limiting rearward movement of the block on reversal of the motor.

7. An outboard motor mounting comprising a boat having an upwardly and rearwardly inclined transverse transom at its stern provided with a transverse recess in its upper edge, a block providing a support for an outboard motor pivotally mounted in said recess by a pivot rod mounted in the block at its upper edge and supported at its opposite ends in the transom at opposite ends of the recess whereby said block is capable of pivoting during normal operation of the boat while in the water, a connecting member comprising an upright plate mounted on and extending transversely of the block, a push rod pivotally connected at one end to said plate at the front of the block at a point spaced below the pivot rod, and means connecting the other end of the push rod to the bottom of the boat at a point spaced forward from the transom.

References Cited in the file of this patent UNITED STATES PATENTS 2,886,462 Jagiel May 12, 1959 2,905,132 Lewis Sept. 12, 1959 2,930,341 Gaston Mar. 29, 1960 

